Autor según el artículo: Bo, C.; Parrot, A.; Bernard, A.; Jacquart, A.; Serapian, S.A.; Derat, E.; Oms, O.; Dolbecq, A.; Proust, A.; Métivier, R.; Mialane, P.; Izzet, G.

Departamento: Química Física i Inorgànica

Autor/es de la URV: BO JANÉ, CARLES; Parrot, A.; Bernard, A.; Jacquart, A.; Serapian, S.A.; Derat, E.; Oms, O.; Dolbecq, A.; Proust, A.; Métivier, R.; Mialane, P.; Izzet, G.

Palabras clave: density functional calculations Fluorescence polyoxometalates

Resumen: The photophysical properties of a Keggin-type polyoxometalate (POM) covalently bounded to a benzospiropyran (BSPR) unit have been investigated. These studies reveal that both closed and open forms are emissive with distinct spectral features (¿em (closed form)=530 nm, ¿em (open form)=670 nm) and that the fluorescence of the BSPR unit of the hybrid is considerably enhanced compared to BSPR parent compounds. While the fluorescence excitation energy of the BSPR reference compounds (370 nm) is close to the intense absorption responsible of the photochromic character (350 nm), the fluorescence excitation of the hybrid is shifted to lower energy (400 nm), improving the population of the emissive state. Combined NOESY NMR and theoretical calculations of the closed form of the hybrid give an intimate understanding of the conformation adopted by the hybrid and show that the nitroaryl moieties of the BSPR is folded toward the POM, which should affect the electronic properties of the BSPR.

Áreas temáticas: Química Química Chemistry

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 1433-7851

Identificador del autor: ; n/a; n/a; n/a; 0000-0003-0122-8499; 0000-0002-8637-2707; n/a; n/a; n/a; n/a; n/a; n/a

Fecha de alta del registro: 2017-04-21

Página final: 4876

Volumen de revista: 56

Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion

Enlace a la fuente original: http://onlinelibrary.wiley.com/doi/10.1002/anie.201701860/abstract

DOI del artículo: 10.1002/anie.201701860

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2017

Página inicial: 4872

Tipo de publicación: Article Artículo Article